What maintenance practices are required to prevent clogging and uneven spray from bitumen emulsion sprayers?

Clogging is prevented by strict cleaning, filtration, and correct shutdown routines. Flush lines and nozzles with approved cleaning medium before the emulsion dries, and clean strainers and filters daily during heavy use. Inspect nozzle wear and replace mismatched nozzles that cause streaks. Keep pump seals, recirculation valves, and pressure regulators in good condition to avoid pressure pulsation. Calibrate spray rate regularly using trays or mats. Avoid long idle periods with emulsion in the spray bar, and protect equipment from contamination by dust and hardened residue.